Amat joined the Swans from La Liga club Espanyol on a four-year contract following a £2.5million move in June 2013.
Born in Canet de Mar, Catalonia, the centre-back had been with Espanyol since the age of seven. He rose through the ranks and featured for the B team in the third division before making his first-team debut at the age of 17.
He managed 26 La Liga appearances in his first full season as Espanyol finished eighth, before featuring in the following campaign which saw the club end up just three points off the top half.
A loan switch to Rayo Vallecano in 2012-13 paid off for both player and club – Amat made 27 appearances, which included a superb 50-yard goal against Valladolid as Michu’s former club claimed eighth place.
In his first season with the Swans, Amat made 30 appearances in all competitions.
His second campaign wasn't as successful, however, with Amat's season struck by injuries.
He missed large parts of 2014-15 and made just 12 appearances in all competitions.
The season had started on a positive note, with the Spaniard starting the first three victories over Manchester United, Burnley and West Brom before a knee injury sustained in the next match against Chelsea ruled him out of action for a few months.
Amat was back in Garry Monk's squad for the second half of the season, but a stress fracture in the foot again ended his campaign in April.
Signed a one-year contract extension in March 2015, which sees him commit to the club until the summer of 2018.
Amat made 11 appearances during the 2015-16 campaign, with starting appearances in the final three games of the season.
He penned another one-year extension in January 2016, with the new deal taking him up until the summer of 2019.

On the international front, Amat has featured for Spain at every age group from Under-16s to Under-21s.
He was part of the squad that finished third at the U17 World Cup in 2009, with Amat playing alongside Manchester United’s David de Gea and former Barcelona striker Bojan Krkic.